The invention discloses an irregular blank workpiece clamping table for a vertical milling machine, and belongs to the field of machining. The irregular blank workpiece clamping table comprises a workpiece groove, fixing rods are arranged on the side walls of the workpiece groove, and fasteners are arranged at the ends, placed in the workpiece groove, of the fixing rods. Each fastener comprises a casing structure, and a clamping piece is arranged at one end of each casing structure. The clamping pieces and the casing structures are hinged to each other, and bore spines are arranged on the clamping pieces. A telescopic supporting rod is arranged at the bottom in the workpiece groove, and a pressure-bearing mechanism is arranged at one end of the telescopic supporting rod. A clamping layer is arranged on the upper portion of the workpiece groove, and a pair of opposite edges of the clamping layer are each provided with a movable vice jaw. Compared with the prior art, through the horizontal clamping of multiple supporting points and the multi-point fixing to workpieces of the clamping layer, blank pieces in various shapes can be clamped; the phenomenon that the blank pieces need to be subjected to rough machining first to be in regular shape so as to be clamped conveniently is needless, and large cutting allowance is reserved for subsequent machining; and moreover the labor intensity is lowered, and manpower and material resources are saved.